Type-writing machine.



c. B. YAW. TYPE WRITING MACHINE. APPLICATION FILED JUNE 15, I912.-

Patented May 11, 1915.

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one B. YAW,

NEW YORK.

or ARLINGTON, NEW. JERSEY, AssieNon. in: MESNE Ass eNIu-EN'rs, TO REMINGTON 'rvrnwnrrna COMPANY, or ILION, NEW roan,

A CORBOBATIQN 0F TYPE-WRITING MACHINE.

meaeeo.

Patented May 11, 1915}.

Application flied June 15,1912.- swarm. 703,822.

To all whom it may concern;

Be it known that I, Cmo B. YAW, citizen of the United States, and resident of Arlin'gton, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

My present invention relates to improved means for turning the platen of a typewriting machine either backward or forward a predetermined fractional line space distance enabling characters to be printed both above and below the normal li'ne of writing Generally stated, the main object of the. invention is to provide-improved means for the purpose specified; and more particularly the object of'the invention is to improve the-construction shown in my prior 'Patent No. 1,016,057, granted January 30, 1912. In the patented construction means are provided-for enabling. exponentsor other characters to be written abovethe normal line of writing. By my present invention the scope of the construction is extended to enable characters to be written either above thelno'rmal line or below the normal line at W1 To the above and other ends my invention consists in the features of construction, arrangements of parts and combinations of devices hereinafter described and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical sectional view of; the upper part of a No. 10 Remington front-strike typewriting machine embodying my invention, the section being taken transversely of the platen and the platen carriage. Fig. 2 is a fragmentary plan view showing the righthand end of the platen and platen frame and my invention applied thereto. Figs. 3

I and 4 are operating views corresponding in the arrows at said line.- -Fi'g. 6 illustrates a specimen of the work done when the auxiliary fractional spacer is employed.

As shown in Fig. 1,- uprights ,or frame 7 posts 1 support a topplate 22in, the said Remington machine. The-'ycarri-age comprising the platen frame 3 detachably mounted anism therefor.

"on a truck4 is adapted to travel on roller bearings 5, said carriage carrying the usual rotative platen 6 and the line spacing mech- At the right end of the platen the usual line spacing ratchet wheel" 7' is connected thereto, said wheel being adapted to be turned step-by-step by a driv ing pawl 8 comprising part of the-regular line spacing mechanism. Said pawl is pivotally mounted at 9 upon an arm 10 adapted .to swing concentrically with the axis of the platen, and to said pawl is pivotally connected at 11 a link or bar 12 whose. opposite end is ivotally connected at 13 to one arm of a bell crank 14 pivoted'at 15 in a lug ,onthe carriage truck. To the other arm of the bell crank 1 1 is pivotally attached at 16 the lower end of a'link 17 whose upper end is pivotally connected at 18 to a short crank arm 19 attached by a screw 20 to the inner or rear end of a rock shaft 21 arranged to oscillate in a tubular bearing 22 mounted on, the carriage. Said rock shaft extends forward beyond its bearing and is formed with a downwardly projecting hand piece 23 by which the line spacing pawl 8 is operated through the connections hereinbefore described to rotate the platen 6 step by step, said platen being adapted to be turned by the pawl 8 either one, two or three notches of the line spacing ratchet wheel 7 according to the adjustment of the line space regulator (not shown).

For the purpose of holding the platen against accidental "rotation and for maintaining it securely in working position there is provided a detent or pressure roll 24: which bears down upon the line spacin ratchet wheel 7 in the space between two of its teeth. The said detent roll is caused to press against the-wheel 7 by means of a flat steel spring 25 upon the forward forked end of which said roll 24 is pivotally Supported or mounted. Said spring or support 25 is movablv secured at its rear end to a bracket or block 26 which bracket is supported on a rod 3 comprised in the platen frame and is securedrigidlv in place on the platen frame bv' a screw -27 which passes through the right-hand side of the platen. frame and enters a hole in the bracket 26 which iscontiguous to the right-hand side of the platen 7 frame; The rear end of said ,Spring 25 is slidably connected tothe block 26 by a shouldered screw- 28, the shankof which is I screwed into a tapped hole on the under side of said bracket, the head of said screw supporting said spring and holding it' against the bottom of said bracket but not so tightly as to prevent the said spring from being moved endwise. 'Where the screw passes throughthe' spring the latter is slotted longitudinally as at v29 to enable thespring to have a limited backward and forward movement. The bracket -26 is pro- .videdv with a vertical slot or kerf, 30 and arranged vertically insaid kerf is an arm, pin or post 31 which is attached to the upper side of the spring 25 bya headed screw 32. Said vscrew passes upward into a tapped hole in the post through a slot'33 in the spring 25, the slot affording a variation in.

the relationship between the post 31 and the spring 25 which facilitates accurate assembling of the parts. The spring is clamped between the post .31 and the head of the screw 32 and by loosening the screw the relationship of the post and spring may "be altered to an extent determined by the length of theslot 33, the parts being fixedly clamped together by tightening said screw. A link 34 is pivoted at its rear end at 35 to the upper end of the arm or post 31, said link being arranged in a.kerf. in said post. The forward end of said link 34 is pivoted at 36 to a hand lever 37, said hand lever being arranged in the kerf or slot-way 30 and pivotally supported on the bracket 26 at 38, and the u per end of said lever 37 being provided with a finger piece, key or handle 39 extending laterally rightward as shown in Fig. 2. As best shown in Figs. 2 and 5 the forward right-hand portion of the bracket 26 is provided with an integral enlargement' or boss 26 in which is formed a horizontal seat or depression 40 open at the left and housing a ball detent 4,1 which is constantly pressed leftward by a coiled spring .41,arranged between the ball and the bottom of the depression 40. In order to provide for drilling or forming the seat or depression 40 and for readily assembling the ball detent 41 and its spring therein, a hole 30 is provided in the left-hand forward portion of the bracket 26, said hole 30* being in register with the depression 40.

Normally the'ball or detent 41 coiiperates.

with a shallow circular depression 42 formed in the right-hand face of the lever 37, said ball coiiperating with said depression to maintain said lever in the central normal position shown in Fig. 1', theleventhrough the-link 34 and post .31. maintaining the spring .25 andfroller' detent 24 is the position shown in said Fig. 1',-this being the normal position of the detent 24 and corresponding with that which saidldet'ent occupiesin the ordinary construction wherein said detent has a fixed anchorage or support, At opposite sides of the depression 42 corresponding circular depressions 43 and 44 are formed in the lever 37, the bod of the lever being widened to afford sufi'leient stock in which to form such depressions. These depressionsare spaced apart a distance such thatthe lever 37, when moved a corresponding right, the rock shaft 21 is oscillated and the bell crank 14 is vibrated, the link 12 moved rearward, and the hooked end of the pawl 8 engaged with the tooth of the ratchet or line spacing wheel 7 v; and as motion is continued the platen is advanced or turned simultaneouslywith said ratchet wheel, the arm 10 swinging rearward as the platen turns.

When it may be desired to turn the platen a definite distance less than the distance between the two teeth on the ratchet wheel 7, for the purpose, say, of writing above the normal line as illustrated by dax in Fig. 6, the finger piece or key 39 of the special line shifter is pulled forward, rocking the lever 37 froni the Fig; 1 to the Fig. 3 position. During this movement the yielding ball detent 41 is forced out of the depression 42 and caused to engage with the depression 43. The lever and connected parts are held in the abnormal predetermined position by the detent devices 41, 43. As the lever 37 is swung forward it acts through the link 34 to draw the arm or post31 forward, said post acting on the connected spring 25 to slide the spring forward from the Fig. 1 to the ig.;3 position. Excessive forward movement of the spring is limited by its rear upturned end 25 which may contact with the rear face of the bracket 26and act as a stop for said spring. The forward movement of the spring or support 25 causes the detent roll 24 to move bodily forward tered with the dotted line a; whereas as shown in Fig. 3 it is in register with the I dotted line band a lower-case printing type 45 is shown as making its lmpression at the .front'face of the platen-in line with the line 'b, which indicates the point at whichthe superscript is to be writteng'a'nd thetype 45 may be set to represent any desired character, exponent or other mark. It will be sents the extent to which the platen is turnedbackward by the forward movement of the roll 24 under the action of the hand leverv 37. As a result of retracting the platen, one or more characters, as-the numerals 1, 3 and 4 in Fig. 6, may be printed above the normal line, dax.

The platen may be returned to normal position under the action of the roll 24 by pressing the key or finger piece 39 rearward to the Fig. 1 position, the roll 24 acting at this time to actuate the platen in the opposite direction, the return movement of the parts being determined 'When the ball detent is fully seated in the central depression 42.

If it be desired to print 1 one or more marks, characters or figures a distance below the normal line and-approximately corresponding to that at which the first .de-

scribed operation enables characters to be written above the normal line, then in such case the operator presses the key or finger piece 39 rearward, swinging the lever 37 from the Fig. 1 to the Fig. 4 position, forc? ing the yielding ball detent 41 outv of the central depression 42 and causing it to engage with the depression 44, thus determin-, ing the extent of rearward movement of the lever 37. Excessive movement of the parts may be prevented by engagement between the post 31 and the rear of the slot 30. As the lever 37 swings rearward it forces the link 34 rearward, said link acting on the post 31 which in turn slidesthe' spring 25 rearward to the Fig. 4 position. This movement of the spring operates through the bodily moveddetent roll 24 to turn the ratchet wheel 7 and the platen connected thereto correspondingly forward a distance approximately of one-half a line spaceas indicated by the dotted lines a and 0 in Fig. 4, the dotted line a as has been stated I indicating the normal. printing point while the dotted line "0' indicates the point at which the typeswill nowlcooperate with the platen below the normal printing line. After the desired ,subscript or characters have been printed. below the normal line, as

for example the numerals 2, 95 -and.

8 in Fig. 6, the platen may be restored by pulling the finger piece 39 forward from the Fig. 4 to the normal or Fig. 1 position,

causing the detent roll 24 to turn back the ratchet wheel 7 and the platen 6 and bringing the normal printing line a back in' reg- 'ister with the printin point.

It will be observe that by my present invention '1 have provided comparatively simple means in the. form of an independent auxiliary line shifter for at will temporarily shifting the line of print a predetermined distance either above or below thenormal spectively in line with the 5 and 8 below the line. Thus space is conserved and the data may be very much condensed, a feature" which is especially desirable in some classes of commercial typewriting, as for example the records kept by telephone companies. Of course, in order to bring the characters abnormally written above and below the normal line into register as illustrated it is necessary to restore the carriage, after one set of abnormally written characters have been printed, to a corresponding line of abnormally written characters to be begununder the first one of the previously written line. Also it is of course to be understood that in some instances it may not be desired to write the two abnormal lines in register with eachother; and further that Fig. 6f ismerely one illustration of numerous ways in which the invention may be employed and thatv the invention may be used to write superscripts or characters above the normal line only; or subscripts or characters below the normalline only,

instead of both above and below as shown..

The invention, for example, is particularly useful in writing mathematical formulae onthe typewriter. 4

Various changes may be made without departing from the spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, the combi-'- nation with a platen and its line spacing wheel, of a movable spring, a detent carried by ,said spring and constantly engaged with said line spacing wheel, and key controlled means for moving said spring and detent a predetermined extent in either of two directions at will to cause corresponding predetermined extents of movement of the platen.

2. In a typewriting machine,the combination with a platen and its line spacing wheel,"of a detent, a spring carry ng thev same and having a slot, means for supporting said spring, and means for moving said spring oppositely from a central normal position and causing corresponding moveextent toward the right to enable the. other ments of the platen in either direction at will.

3. In a typewriting machine, the combi- &

nation with a platen and its line spacing wheel, of a spring carrying a detent and also having a slot, a bracket, and a screw for sustaining said spring, and means for moving the spring longitudinally in either direction from a central normal position to efiect through the detent and line spacing wheel corresponding rotative movements of said platen.

4. In a typewriting machine, the combination with a platen and its line spacing wheel, of a detent, a support therefor, a

link connected to said support, a hand lever connected to said link, and detent devices for maintaining said lever in a central position and also for maintaining said lever in either of two abnormal positions.

5. In a typewriting machine, the combination with a platen and its line spacing wheel, of a detent, a spring support therefor, an arm extending upward from said support, a link connected at one end to said arm, a hand lever to which the other end of said link is connected, and means for maintaining said hand lever and connected parts in either of three predetermined positions.

6. In a typewriting machine, the combination with a platen and a connected line spacing ratchet wheel,-of a detent roll constantly engaging with said ratchet wheel, means for maintaining said roll in a normal position, and key operated means for moving said roll either forward or backward a predetermined extent from its normal position and for setting said roll in either one of the predetermined abnormal positions to which it may be moved from said central position.

7. In a typewriting machine, the combination with a platen and its line spacing wheel, of a detent, a support therefor, a hand lever connected to said support for moving it and the detent, and detent de vices cooperative with said hand lever, said detent devices comprising a spring pressed ball and cooperative depressions.

8. In a typewriting machine, the combination with a platen and its line'spacing wheel of a detent, a support therefor, a hand *lever connected to said support for moving it and the detent, and detent devices cooperative with said hand lever, said detent devices comprising a series of depressions in said lever and a cooperative spring-pressed ball.

Signed at the borough of Manhattan, city of New York, in the county of New York, and State of'New York, this 14th day of June, A. D. 1912. I

CLIO B. YAW. Witnesses:

CHARLES E. SMITH, M. F. HANNWEBER. 

